Quantum dynamics of gate operations on charge qubits

R. Green, J. B. Wang*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


We present a detailed analysis of the time evolution of a charge qubit realized in the lowest bound states of a double well potential. A mechanism for quantum gate operations on this qubit is modeled by directly solving the corresponding time-dependent Schrödinger equation. We demonstrate that the mechanism induces complicated non-adiabatic time evolution of the qubit system. With ideal potentials and instantaneous switching, this mechanism is shown to be capable of carrying out a NOT gate operation, and rotations by π/4 and 3π/4 Effects of non-ideal potentials and smooth switching are also examined.

Original languageEnglish
Pages (from-to)309-316
Number of pages8
JournalJournal of Computational and Theoretical Nanoscience
Issue number3
Publication statusPublished - Sep 2004
Externally publishedYes


  • Charge qubits
  • Quantum dynamics
  • Quantum gates
  • Time-dependent Schrödinger equation


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